KR102310988B1 - Apparatus and method for communicating - Google Patents

Abstract

The present invention relates to a communication apparatus and method in a wireless communication system, in which a terminal device in a wireless communication system according to an embodiment of the present invention receives a transmission unit for transmitting a first signal to a base station or another terminal and a second signal from the base station a first communication unit including a first receiving unit, a second communication unit including a second receiving unit receiving a third signal transmitted from the other terminal, and a third receiving unit receiving a fourth signal transmitted from the base station; The first communication unit is connected to the first terminal, and the second communication unit is connected to the second terminal, and in a terminal communication mode, TDD (time division duplex) switching is performed between the first terminal and the second terminal. and a switch module connected to the first terminal in a base station communication mode.

Description

COMMUNICATION DEVICE AND METHOD

The present invention relates to a terminal communication apparatus and method in a wireless communication system.

In a wireless communication system, a terminal may perform communication based on a cellular communication method. Here, the cellular communication method refers to a base station-based communication method, and by setting a cell of a specific radius around the base station through the cellular communication method, the same frequency can be reused at a predetermined distance. .

Meanwhile, in a wireless communication system, a terminal may directly communicate with an adjacent terminal without going through a base station. For example, the terminal may directly communicate with an adjacent terminal through a device to device (D2D) communication method or the like.

As such, the terminal device may include a communication unit capable of communicating with the base station and a communication unit capable of communicating with other terminals. Also, the terminal device may be provided with a plurality of antennas to perform a diversity communication function.

As described above, the terminal can communicate with adjacent devices through various communication methods. In order for the terminal to perform smooth communication by supporting all of these communication methods, a more efficient transmission/reception structure is required.

A terminal device according to various embodiments of the present disclosure may provide an apparatus and method for controlling device to device communication with another terminal in a time division manner.

A terminal device according to various embodiments of the present disclosure may provide an apparatus and method for using a transmission and reception frequency with another terminal as an uplink frequency of a base station, and separately executing transmission and reception operations with the other terminal. .

The terminal device according to various embodiments of the present disclosure configures the D2D transmission and reception frequency to use a frequency in the same band as the uplink frequency of the base station and to separate the D2D transmission and reception paths, and when the base station transmission function is not performed It is possible to provide an apparatus and method capable of communicating by time division control of the D2D transmission and reception.

In a wireless communication system according to an embodiment of the present invention, a terminal device includes a first communication unit including a transmitting unit for transmitting a first signal to a base station or another terminal and a first receiving unit for receiving a second signal from the base station, and the other terminal A second communication unit including a second receiving unit for receiving a third signal transmitted from and a third receiving unit for receiving a fourth signal transmitted from the base station, the first communication unit is connected to the first terminal, the second A communication unit is connected to the second terminal, performs time division duplex (TDD) switching between the first terminal and the second terminal in a terminal communication mode, and is connected to the first terminal in a base station communication mode It is characterized in that it includes a switch module (switch module).

A method of operating a terminal in a wireless communication system according to another embodiment of the present invention includes a transmitter for transmitting a first signal to a base station or another terminal in a base station communication mode and a first receiver for receiving a second signal from the base station A process of transmitting and receiving a signal to and from the base station through the first communication unit, and a second receiving unit for transmitting a signal to the other terminal through the first communication unit or receiving a third signal transmitted from the other terminal in the terminal communication mode and receiving a signal from the other terminal through a second communication unit including a third receiving unit for receiving a fourth signal transmitted from the base station.

According to an embodiment of the present invention, in a wireless communication system, by providing an apparatus and method for transmitting or receiving a signal in both a base station operation mode or a terminal operation mode, loss of transmission or reception power of a signal and loss of a transmission signal or a reception signal Loss can be reduced, and thus, signal transmission/reception efficiency can be increased.

1 illustrates a configuration of a terminal in a wireless communication system according to an embodiment of the present invention.
2 illustrates a configuration of a wireless communication unit of a terminal in a wireless communication system according to another embodiment of the present invention.
3 illustrates a configuration of a terminal in a wireless communication system according to another embodiment of the present invention.
4 illustrates a configuration of a terminal in a wireless communication system according to another embodiment of the present invention.
5 illustrates a configuration of a terminal in a wireless communication system according to another embodiment of the present invention.
6 is a flowchart illustrating an operation of a terminal in a wireless communication system according to an embodiment of the present invention.
7 is a flowchart illustrating an operation of a terminal in a wireless communication system according to another embodiment of the present invention.

Hereinafter, the operating principle of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, if it is determined that a detailed description of a known function or configuration related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. And the terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to intentions or customs of users and operators. Therefore, the definition should be made based on the content throughout this specification.

Various embodiments of the present invention can be made various changes and can have various embodiments, specific embodiments are illustrated in the drawings and the related detailed description is described. However, this is not intended to limit the various embodiments of the present invention to specific embodiments, and should be understood to include all changes and/or equivalents or substitutes included in the spirit and scope of various embodiments of the present invention. In connection with the description of the drawings, like reference numerals have been used for like components.

Expressions such as “includes” or “may include” that may be used in various embodiments of the present invention indicate the existence of a disclosed corresponding function, operation, or component, and may include one or more additional functions, operations, or components, etc. are not limited. In addition, in various embodiments of the present invention, terms such as "comprise" or "have" are intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, It should be understood that it does not preclude the possibility of addition or existence of one or more other features or numbers, steps, operations, components, parts, or combinations thereof.

In various embodiments of the present disclosure, expressions such as “or” include any and all combinations of words listed together. For example, “A or B” may include A, may include B, or include both A and B.

Expressions such as “first,” “second,” “first,” or “second,” used in various embodiments of the present invention may modify various components of various embodiments, but limit the components. I never do that. For example, the above expressions do not limit the order and/or importance of corresponding components. The above expressions may be used to distinguish one component from another. For example, both the first user device and the second user device are user devices, and represent different user devices. For example, without departing from the scope of the present disclosure, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component.

When a component is referred to as being “connected” or “connected” to another component, the component may be directly connected or connected to the other component, but the component and It should be understood that other new components may exist between the other components. On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it will be understood that no new element exists between the element and the other element. should be able to

Terms used in various embodiments of the present invention are only used to describe specific embodiments, and are not intended to limit various embodiments of the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by those of ordinary skill in the art to which various embodiments of the present invention pertain. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in various embodiments of the present invention, ideal or excessively formal terms not interpreted as meaning

Through the following content, a description of the terminal communication apparatus and method will be continued.

1 illustrates a configuration of a terminal in a wireless communication system according to an embodiment of the present invention.

Referring to FIG. 1 , the terminal may include a modulator/demodulator (MODEM) 110, a radio frequency integrated circuit (RFIC) 130, a first front-end module (FEM) 150, and a second FEM 170. Here, the modem 110 may be electrically coupled to the RFIC 130 , and the RFIC 130 may be electrically coupled to the first FEM 150 and the second FEM 170 . Hereinafter used '… wealth', '… A term such as 'group' means a unit for processing at least one function or operation, which may be implemented as hardware or software, or a combination of hardware and software.

Here, the modem 110 may perform a conversion function between a baseband signal and a bit stream according to a physical layer standard of a system. Specifically, when transmitting data, the modem 110 may generate complex symbols by encoding and modulating a transmission bit stream. In addition, when receiving data, the modem 110 may restore a received bit stream by demodulating and decoding the baseband signal provided from the RFIC 130 . For example, the modem 110 transmits the transmission signal to a preset modulation scheme (channel encoding, modulation (eg, orthogonal frequency-division multiplexing access (OFDMA)), code division multiple access (CDMA), TD-CDMA (time -division-code division multiple access), phase and/or amplitude modulation (eg, quadrature phase shift keying (QPSK) method, 16QAM (quadrature amplitude modulation) method, 64QAM method, etc.) .

The RFIC 130 may perform a function for transmitting and receiving a signal through a wireless channel, such as band conversion and amplification of the signal. That is, the RFIC 130 up-converts the baseband signal provided from the modem 110 into a radio frequency (RF) band signal, transmits it through an antenna, and downconverts the RF band signal received through the antenna into a baseband signal. can do. For example, the RFIC 130 may include a transmit filter, a receive filter, an amplifier, a mixer, an oscillator, a digital to analog converter (DAC), an analog to digital converter (ADC), and the like.

The first FEM 150 or the second FEM 170 outputs a transmission signal through a corresponding antenna antenna 190 or 195 using a time division duplex (TDD) and/or frequency division duplex (FDD) scheme, respectively, and the antenna 190 Alternatively, the transmission/reception path may be switched to process a signal received through 195. The first FEM 150 or the second FEM 170 may be configured with an antenna switch module (ASM) and/or band filters. And the first antenna 190 may be a primary antenna, and the second antenna 195 may be a diversity antenna. .

The first FEM 150 or the second FEM 170 may include an antenna switch module (ASM), a saw filter, and an RF switch. Here, the saw filter is a bandpass filter having a narrow pass bandwidth, the ASM may switch transmission/reception signals, and the RF switch may switch radio signals of various bands.

Specific operations of the RFIC 130, the first FEM 150, and the second FEM 170 according to an embodiment of the present invention will be described in detail below with reference to FIG. 2 .

2 is a diagram illustrating a configuration of a wireless communication unit of a terminal in a wireless communication system according to another embodiment of the present invention. 2 may be a configuration of the RFIC 130 and the first FEM 150 in FIG. 1 .

Referring to FIG. 2 , the terminal may include a first communication unit 210 , a second communication unit 220 , and a first switch module 230 , wherein the first communication unit 210 includes a transmitter 211 and a first reception unit 213 . and the second communication unit 220 may include a second receiving unit 221 and a third receiving unit 223 . In this case, the first switch module 230 may be included in the first FEM 150 illustrated in FIG. 1 , and the first communication unit 210 and the second communication unit 220 may be the RFIC 130 or the first FEM illustrated in FIG. 1 . 150 may be included.

Here, the terminal may perform communication in a base station communication mode or a terminal communication mode. The base station communication mode means a communication method based on a base station, and according to an embodiment of the present invention, the base station communication mode may mean a cellular communication mode. In addition, the terminal communication mode refers to a method in which the terminal directly communicates with an adjacent terminal without going through a base station. According to an embodiment of the present invention, the terminal communication mode is a device to device (D2D) communication mode. can mean In the following description, base station communication will be referred to as cellular communication, and communication between terminals will be referred to as D2D communication. Here, the TX and RX frequencies of the D2D communication may use a frequency of the same band as an uplink (UL) frequency of the cellular communication.

Specifically, the transmitter 211 included in the first communication unit 210 may transmit a WAN TX signal to a base station or another terminal. In other words, when the terminal operates in the base station communication mode, the transmitter 211 may transmit the WAN TX signal to the base station, and when the terminal operates in the terminal communication mode, the transmitter 211 D2D to the other terminal A TX signal can be transmitted. Here, the WAN TX and D2D TX signals may be the first signals. In addition, the first receiver 213 included in the first communication unit 210 may receive a WAN RX signal from the base station. In other words, when the terminal operates in a base station communication mode, the first receiver 213 may receive the WAN RX signal from the base station. Here, the WAN RX signal may be the second signal.

In addition, the second receiving unit 221 included in the second communication unit 220 may receive a D2D RX signal transmitted from the other terminal. In other words, when the terminal operates in the terminal communication mode, the second receiver 221 may receive the D2D RX signal transmitted from the other terminal. Here, the D2D RX signal may be the third signal. In addition, the third receiving unit 223 included in the second communication unit 220 may receive the WAN RX signal transmitted from the base station. In other words, when the terminal operates in the base station communication mode, the third receiver 223 may receive the WAN RX signal transmitted from the base station. Here, the WAN RX signal may be the second signal.

Referring to FIG. 2 , the first communication unit 210 may be functionally connected to a first terminal 240 , and the second communication unit 220 may be functionally connected to a second terminal 250 . Here, the functionally connected may include any direct connection or indirectly connected connection. In addition, the first switch module 230 may be connected to the first terminal 240 and the second terminal 250, respectively, and a common terminal may be connected to an antenna (which may be the first antenna 190 in this case). The first switch module 230 may perform a switching operation in a terminal communication mode by a controller of a terminal device (not shown), and may be connected to the second terminal 240 in a base station communication mode. That is, the first switch module 230 may transmit and receive D2D TX and RX signals by switching (time division duplex (TDD) switching) between the first terminal 240 and the second terminal 250 by the TDD signal in the terminal communication mode. In addition, the first switch module 230 is connected to the first terminal 240 by a terminal controller (not shown) in the base station communication mode, and the first communication unit 210 performs a frequency division duplex (FDD) operation to provide TX and RX signals to the base station. can transmit and receive.

In other words, when the terminal performs communication in the base station communication mode, the first switch module 230 may be connected to the first terminal 240 . Accordingly, the terminal may communicate with the base station through the first communication unit 211 . Specifically, the transmitter 211 included in the first communication unit 210 may transmit the first signal (WAN TX signal) to the base station on an uplink channel, and the first receiver 213 may transmit the first signal (WAN TX signal) to the base station through the downlink channel. The transmitted second signal (WAN RX signal) may be received.

In addition, when the terminal performs communication in the terminal communication mode, the first switch module 230 may perform TDD switching between the first terminal 240 and the second terminal 250 . In other words, when a signal is transmitted from the terminal to the other terminal in the terminal communication mode, the first switch module 230 may be coupled to the first terminal 240, and in the terminal communication mode, the terminal When receiving a signal from the terminal, the first switch module 230 may be coupled to the second terminal 250 . When the first switch module 230 is coupled to the first terminal 240, the transmitter 211 included in the first communication unit 210 may transmit the first signal (D2D TX signal) to the other terminal, and the first When the first switch module 230 is coupled to the second terminal 250, the second receiving unit 221 included in the second communication unit 220 may receive the third signal (D2D RX signal) from the other terminal. As described above, the terminal according to various embodiments of the present invention has a configuration that separates transmission and reception paths (TX path and RX path) for D2D communication, so that cellular communication is not affected by D2D communication. communication can be performed. That is, the terminal according to various embodiments of the present invention can prevent the deterioration of TX performance of cellular communication by separating the transmission path and the reception path of the D2D communication and not using a switch at the rear end of the transmission path.

Specific operations of the first communication unit 210 , the second communication unit 220 , and the first switch module 230 will be described in detail below with reference to FIG. 3 .

3 illustrates a configuration of a terminal in a wireless communication system according to another embodiment of the present invention.

Referring to FIG. 3, the terminal may include a first communication unit 210, a second communication unit 220, and a first switch module 230, wherein the first communication unit 210 includes a transmitting unit 211 and a first receiving unit 213, The second communication unit 220 may include a second receiving unit 221 and a third receiving unit 223 . In this case, the first switch module 230 may be included in the first FEM 150 illustrated in FIG. 1 , and the first communication unit 210 and the second communication unit 220 may be the RFIC 130 or the first FEM illustrated in FIG. 1 . 150 may be included.

In addition, the transmitter 211 may include a base station transmitter 311 , a terminal transmitter 312 , a second switch module 313 , a power amplifier (PA) 314 , and a bandpass filter 315 . In addition, the first receiver 213 may include a first base station receiver 316 , a low-noise amplifier (LNA) 317 , and a band pass filter 315 . In addition, the second receiver 221 may include a terminal receiver 321 , an LNA 322 , and a band pass filter 323 , and the third receiver 223 may include a second base station receiver 324 , an LNA 325 , and a band pass filter 323 . The bandpass filters 315 and 323 may be duplex filters. The band pass filter 315 is a band pass filter (BPF: band pass filter) that can separate and pass frequencies of an uplink band (UL) and a downlink band (DL) of cellular communication. ) can be Here, the base station transmitter 311 is a cellular transmitter, the terminal transmitter 312 is a D2D transmitter, the first base station receiver 316 is a first cellular receiver, the terminal receiver 321 is a D2D receiver 321, and the second base station receiver 324 may be referred to as a second cellular receiver 324, respectively.

The PA (power amplifier) 314 is a power amplifier, and serves to amplify the power of an input signal, and the low noise amplifiers (LNA) 317, 322, and 325 are low noise amplifiers and amplify the weak signal received by the antenna. play a role in amplification. The band-pass filters 315 and 323 are connected to an antenna to separate a transmission frequency and a reception frequency, and the band-pass filters 315 and 323 may include band-pass filters that pass only frequencies of a specific band. According to an embodiment of the present invention, the bandpass filters 315 and 323 each include a bandpass filter passing a specific frequency band corresponding to the uplink resource and a bandpass filter passing a specific frequency band corresponding to the downlink resource, respectively. can do.

Also, the second switch module 313 included in the first communication unit 210 may be connected to an output terminal of the base station transmission unit 311 or the terminal transmission unit 312 . The second switch module 313 may select the output of the base station transmitter 311 in the base station communication mode under the control of a terminal device (not shown), and may select the output of the terminal transmitter 312 in the terminal communication mode. This is to select the base station transmitter 311 or the terminal transmitter 312 according to the communication mode because the D2D communication frequency is the same as the frequency of the UL band of the base station communication. In other words, when the terminal performs communication in the base station communication mode, the second switch module 313 may be coupled to the base station transmitter 311, and when the terminal performs communication in the terminal communication mode, the second switch module 313 may be combined with the terminal transmitter 312 . Here, when the controller of the terminal device controls the operation of the base station transmitter 311 or the terminal transmitter 312 according to the communication mode, the second switch module 313 may be omitted.

According to an embodiment of the present invention, when the terminal performs communication in the base station communication mode, the first switch module 230 may be coupled to the first terminal 240, and accordingly, the terminal communicates with the first communication unit 211 It is possible to perform communication with the base station through the Specifically, the second switch module 313 may be coupled to the base station transmitter 311, and a signal output from the base station transmitter 311 passes through a specific frequency band corresponding to the uplink resource included in the PA 314 and the band pass filter 315. It can be transmitted to the base station through a band-pass filter. In addition, the signal received from the base station may pass through a band pass filter that passes a specific frequency band corresponding to a downlink resource included in the band pass filter 315 and an LNA 317 and may be output to the first base station receiver 316 .

According to an embodiment of the present invention, when the terminal performs communication in the terminal communication mode, the first switch module 230 may perform TDD switching between the first terminal 240 and the second terminal 250 . In other words, when a signal is transmitted from the terminal to the other terminal in the terminal communication mode, the first switch module 230 may be coupled to the first terminal 240, and in the terminal communication mode, the terminal When receiving a signal from the terminal, the first switch module 230 may be coupled to the second terminal 250 .

When the terminal performs communication in the terminal communication mode, and the first switch module 230 is coupled with the first terminal 240, the second switch module 313 is coupled with the terminal transmitter 312 for signal transmission in the terminal communication mode can be In an embodiment of the present invention, only under the condition that the terminal does not operate in the base station communication mode, that is, the terminal does not perform cellular communication, the second switch module 313 may be combined with the terminal transmitter 312. may be In this case, the signal output from the terminal transmitter 312 may pass through a bandpass filter that passes a specific frequency band corresponding to the uplink resource included in the PA 314 and the bandpass filter 315, and may be transmitted to another terminal.

In this case, even if the uplink resource is used for operation in the terminal communication mode, the downlink resource may still be used for the operation in the base station communication mode. In other words, the signal received from the base station may pass through a band pass filter that passes a specific frequency band corresponding to the downlink resource included in the band pass filter 315 and the LNA 317 to be output to the first base station receiver 316 .

In addition, when the terminal performs communication in a terminal communication mode and the first switch module 230 is coupled to the second terminal 250, the second receiver 221 included in the second communication unit 220 receives a signal from the other terminal. can receive In other words, the signal transmitted from the other terminal may pass through a bandpass filter that passes a specific frequency band corresponding to the uplink resource included in the bandpass filter 323 and the LNA 322 and may be output to the terminal receiver 321 .

In this case, even if the uplink resource is used for operation in the terminal communication mode, the downlink resource may still be used for the operation in the base station communication mode. In other words, the signal received from the base station may pass through a band pass filter that passes a specific frequency band corresponding to the downlink resource included in the band pass filter 323 and the LNA 325 to be output to the second base station receiver 324 .

4 illustrates a configuration of a terminal in a wireless communication system according to another embodiment of the present invention.

Referring to FIG. 4, the terminal may include a first switch module 230, PA 314, bandpass filters 315, 324, LNA 317, 322, 325. Here, the PA 314 and the band pass filter 315 may be included in the transmitter 211 shown in FIG. 2 , and the LNA 317 and the band pass filter 315 may be included in the first receiver 213 shown in FIG. 2 . , The LNA 322 and the bandpass filter 323 may be included in the second receiver 221 illustrated in FIG. 2 , and the LNA 325 and the bandpass filter 323 may be included in the third receiver 223 illustrated in FIG. 2 .

In addition, the terminal may include four paths for transmitting or receiving a signal with a base station or another terminal. In other words, the terminal may include a transmission path 410, a first cellular reception path 420, a first D2D reception path 430, and a second cellular reception path 440, respectively.

As described above, the band pass filters 315 and 323 may be duplex filters. The band pass filter 315 is a band pass filter (BPF: band pass filter) that can separate and pass frequencies of an uplink band (UL) and a downlink band (DL) of cellular communication. ) can be The band pass filter 315 may band-filter the TX signal or the D2D TX signal of cellular communication with the UL band filter and transmit it to the 250 terminal of the first switch module 230, and cellular communication received through the 240 terminal of the first switch module 230 The RX signal of the DL band filter may be band-filtered and transmitted to the first base station transmitter 316 . In addition, the band pass filter 323 may band-filter the D2D RX signal received through the 250 terminal of the first switch module 230 with a UL band filter and transmit it to the terminal receiving unit 321, and the cellular received through 250 of the first switch module 230 The RX signal of communication may be band-filtered with a DL band filter and transmitted to the second base station receiving unit 324 .

According to an embodiment of the present invention, when the terminal performs the base station communication mode, the first switch module 230 may be connected to the first terminal 240, and accordingly, the terminal is connected to the transmission path 410 or the first cellular Through the reception path 420, communication with the base station may be performed. Specifically, the WAN TX signal output from the power amplifier (PA) 314 through the transmission path 410 may pass through the UL bandpass filter of the bandpass filter 315, and may be transmitted to the base station. In addition, the WAN RX signal received from the base station may pass through the DL band pass filter of the band pass filter 315, and may be transmitted to the base station receiver through the low noiser amplifier (LNA) 317 and the path 420 .

In addition, in the case of a terminal communication mode communicating with another terminal, the first switch module 230 may perform TDD switching between the first terminal 240 and the second terminal 250 by a terminal controller (not shown). In other words, in the terminal communication mode, when a signal is transmitted from the terminal to the other terminal, the first switch module 230 may be connected to the first terminal 240, and when receiving a signal from the other terminal, the first switch module 230 One switch module 230 may be connected to the second terminal 250 .

In the transmission mode section of the terminal communication mode, the first switch module 230 is connected to the first terminal 240, and the terminal may transmit a D2D TX signal to another terminal through the transmission path 410. That is, the D2D TX signal output from the PA 314 through the transmission path 410 is applied to the 240 terminal of the switch module through the UL band pass filter of the band pass filter 315, and to another terminal device through the first switch module 230 and the antenna. can be transmitted. In this case, even if the uplink resource is used for operation in the terminal communication mode, the downlink resource may still be used for the operation in the base station communication mode. In other words, the WAN RX signal received from the base station may be applied to the base station receiver through the DL band pass filter of the band pass filter 315, the LNA 317, and the first cellular reception path 420 .

Also, in the reception mode section of the terminal communication mode, the first switch module 230 may be connected to the second terminal 250 . Then, the first switch module 230 may transmit the D2D signal received through the antenna to the bandpass filter 323 . In this case, the D2D RX signal may use a frequency of the UL band. Accordingly, the D2D RX signal passes through the UL band filter of the band pass filter 323, and may be transmitted to the terminal receiving unit through the LNA 322 and the path 430. In this case, even if the uplink resource is used for operation in the terminal communication mode, the downlink resource may still be used for the operation in the base station communication mode. In other words, the signal received from the base station may be transmitted to the base station receiving unit through the DL band pass filter of the band pass filter 323, the LNA 325, and the second cellular reception path 440 .

Here, the D2D TX and RX may be activated when TX of cellular communication is not performed. That is, the D2D TX and RX operations may be performed when cellular communication TX is not performed. And if cellular communication TX is required while the D2D TX and RX functions are being performed, the controller of the terminal device may drop the D2D communication operation.

5 illustrates a configuration of a terminal in a wireless communication system according to another embodiment of the present invention.

Referring to FIG. 5 , the terminal may transmit or receive a signal using two or more antennas. For example, if the base station performs a downlink operation with a transmit diversity function, the terminal must be able to receive a downlink signal through the receive diversity function. 5 illustrates an example in which a base station performs a transmit diversity function and a terminal device performs a receive diversity function. In FIG. 5 , the first antenna 510 may be a primary antenna, and the second antenna 520 may be a diversity antenna.

Referring to FIG. 5 , the transmission/reception structure coupled to the first antenna 510 may include a first switch module 230 , a PA 314 , and bandpass filters 315 , 324 , LNA 317 , 322 , and 325 . Here, the PA 314 and the band pass filter 315 may be included in the transmitter 211 shown in FIG. 2 , and the LNA 317 and the band pass filter 315 may be included in the first receiver 213 shown in FIG. 2 . , The LNA 322 and the bandpass filter 323 may be included in the second receiver 221 illustrated in FIG. 2 , and the LNA 325 and the bandpass filter 323 may be included in the third receiver 223 illustrated in FIG. 2 . The transmission/reception structure coupled to the first antenna 510 in FIG. 5 is substantially the same as the transmission/reception structure of the terminal illustrated in FIG. 4 .

In addition, the transmission/reception structure coupled to the second antenna 520 may include a third switch module 530, a bandpass filter 553, and LNAs 551 and 561. In this case, the transmission/reception structure coupled to the second antenna 520 may be included in the RFIC 130 or the second FEM 170 illustrated in FIG. 1 .

In addition, the terminal may include six paths for transmitting or receiving signals with the base station or other terminals. In other words, the terminal may include a transmission path 410 coupled with the first antenna 510, a first cellular reception path 420, a first D2D reception path 430, and a second cellular reception path 440, respectively, and the second antenna 520 and A combined second D2D receive path 550 and a third cellular receive path 560 may be included, respectively.

According to an embodiment of the present invention, the terminal may transmit/receive a signal through the first antenna 510.

First, when the terminal performs communication in the base station communication mode, the first switch module 230 may be coupled to the first terminal 240, and accordingly, the terminal is coupled to the transmission path 410 with the first antenna 510 Alternatively, communication with the base station may be performed through the first cellular reception path 420 . Specifically, the signal output from the PA 314 through the transmission path 410 may pass through a band pass filter that passes a specific frequency band corresponding to the uplink resource included in the band pass filter 315, and may be transmitted to the base station. In addition, the signal received from the base station passes through a band pass filter that passes a specific frequency band corresponding to the downlink resource included in the band pass filter 315, and is output to the LNA 317 through the first cellular reception path 420 can be

In addition, when the terminal performs communication in the terminal communication mode, the first switch module 230 may perform TDD switching between the first terminal 240 and the second terminal 250 . In other words, when a signal is transmitted from the terminal to the other terminal in the terminal communication mode, the first switch module 230 may be coupled to the first terminal 240, and in the terminal communication mode, the terminal When receiving a signal from the terminal, the first switch module 230 may be coupled to the second terminal 250 .

When the terminal performs communication in a terminal communication mode and the first switch module 230 is coupled to the first terminal 240, the terminal transmits a signal to another terminal through a transmission path 410 coupled to the first antenna 510 can send In an embodiment of the present invention, the terminal communication mode may be performed only under the condition that the terminal does not operate in the base station communication mode, that is, the terminal does not perform cellular communication. Specifically, the signal output from the PA 314 through the transmission path 410 may pass through a band pass filter that passes a specific frequency band corresponding to the uplink resource included in the band pass filter 315, and may be transmitted to another terminal.

In this case, even if the uplink resource is used for operation in the terminal communication mode, the downlink resource may still be used for the operation in the base station communication mode. In other words, the signal received from the base station passes through a band pass filter that passes a specific frequency band corresponding to the downlink resource included in the band pass filter 315, and the first cellular reception path coupled to the first antenna 510 It may be output to the LNA 317 through 420.

In addition, when the terminal performs communication in a terminal communication mode and the first switch module 230 is coupled to the second terminal 250, the terminal selects the first D2D reception path 430 coupled to the first antenna 510 It is possible to receive a signal from another terminal through In other words, the signal transmitted from the other terminal passes through a band-pass filter that passes a specific frequency band corresponding to the uplink resource included in the band-pass filter 323, and through the first D2D reception path 430, LNA 322 can be output as

In this case, even if the uplink resource is used for operation in the terminal communication mode, the downlink resource may still be used for the operation in the base station communication mode. In other words, the signal received from the base station passes through a band pass filter that passes a specific frequency band corresponding to the downlink resource included in the band pass filter 323, and the second cellular reception path coupled to the first antenna 510 It may be output to the LNA 325 through 440.

In addition, the terminal may transmit/receive a signal through the first antenna 510 and simultaneously transmit/receive a signal through the second antenna 520 .

That is, the terminal may receive a signal from another terminal through the second D2D reception path 550 coupled to the second antenna 520 . In other words, the signal transmitted from the other terminal passes through a band-pass filter that passes a specific frequency band corresponding to the uplink resource included in the band-pass filter 553, and through the second D2D reception path 550, LNA 551 can be output as

In this case, even if the uplink resource is used for operation in the terminal communication mode, the downlink resource may still be used for the operation in the base station communication mode. In other words, the signal received from the base station passes through a band pass filter that passes a specific frequency band corresponding to the downlink resource included in the band pass filter 553, and the third cellular reception path coupled to the second antenna 520 It may be output to the LNA 561 through 560.

6 is a flowchart illustrating an operation of a terminal in a wireless communication system according to an embodiment of the present invention.

First, in step 601, the terminal transmits a first signal (WAN TX) to the base station in the base station communication mode, and transmits a first signal (D2D TX) to another terminal in the terminal communication mode, and a second signal from the base station A signal is transmitted and received with the base station through the first communication unit 210 including the first reception unit 213 for receiving (WAN RX).

Specifically, in the base station communication mode, the terminal may transmit the first signal to the base station in an uplink channel through the base station transmitter 311 included in the transmitter 211. That is, as shown in FIG. 4 , the terminal may transmit the first signal to the base station through the transmission path 410 .

In addition, in step 603, in the terminal communication mode, the terminal transmits a signal to another terminal through the first communication unit 210 or receives a third signal (D2D RX) transmitted from another terminal. A signal may be received from another terminal through the second communication unit 220 including the third receiving unit 223 for receiving the fourth signal WAN RX.

In other words, the terminal may transmit a signal through the first communication unit 210 when transmitting a signal to the other terminal in the terminal communication mode, and when receiving a signal from the other terminal in the terminal communication mode, A signal may be received through the second communication unit 220 . Specifically, in the terminal communication mode, the terminal may transmit the first signal to the other terminal in an uplink channel through the terminal transmitter 312 included in the transmitter 211, and the terminal is in the terminal communication mode, Through the terminal receiver 321 included in the second receiver 221, the third signal may be received from the other terminal in an uplink channel. That is, as shown in FIG. 4 , the terminal may transmit a signal to the other terminal through the transmission path 410 or receive a signal from the other terminal through the first D2D reception path 430 .

According to an embodiment of the present invention, the terminal may transmit the first signal to the other terminal through an uplink channel only under a condition that the base station communication mode is not performed.

7 is a flowchart illustrating an operation of a terminal in a wireless communication system according to another embodiment of the present invention.

First, in step 701, the terminal may determine whether the terminal is performing communication in the base station communication mode. Here, the base station communication mode may mean a communication method based on a base station, and according to an embodiment of the present invention, the base station communication mode may mean a cellular communication mode. In step 701, if the terminal is in the base station communication mode, proceeding to step 703, the first switch module 230 may be connected to the first terminal 240 coupled to the first communication unit 210.

In addition, in step 705, the terminal may transmit the first signal WAN TX to the base station through the base station transmitter 311 included in the first communication unit 210. In other words, the terminal may transmit the first signal WAN TX to the base station through the base station transmitter 311 of the first communication unit 210 in the base station communication mode.

In particular, when the terminal performs communication in the base station communication mode, the second switch module 313 included in the first communication unit 210 may be connected to the base station transmitter 311 . In this case, the first signal output from the base station transmitter 311 may pass through the UL band pass filter of the PA 314 and the band pass filter 315 to be transmitted to the base station.

Next, in step 707 , the terminal may receive the second signal WAN RX and transmit it to the base station receiver 316 of the first communication unit 210 . In other words, the terminal may receive a signal (downlink signal) transmitted from the base station in the base station communication mode and transmit it to the base station receiver 316 of the first communication unit 210 . In particular, when the terminal performs communication in the base station communication mode, the second switch module 313 included in the first communication unit 210 may be connected to the first base station reception unit 316 . In this case, the signal received from the base station may pass through the DL band pass filter of the band pass filter 315 and the LNA 317 to be output to the first base station receiver 316 .

In addition, if the terminal communication mode in step 701, the terminal may proceed to step 709. In this case, the terminal communication mode may mean a device to device (D2D) communication mode.

In the terminal communication mode, the terminal device may perform TDD switching control of the first switch module 230 . Then, the first switch module 230 may switch and connect the terminal 240 or the terminal 250 . In this case, the terminal may check whether the first switch module 230 is coupled to the first terminal 240 coupled to the first communication unit 210 in step 709 . The first switch module 230 may be coupled to one of the first terminal 240 and the second terminal 250. In a terminal communication mode, the first switch module 230 is connected between the first terminal 240 and the second terminal 250. Time division duplex (TDD) switching may be performed. In step 709, when detecting that the first switch module 230 is connected to the first terminal 240, the terminal proceeds to step 711 and receives a first signal D2D TX transmitted from the terminal transmitter 312 included in the first communication unit 210 can send In this case, in the transmission section of the terminal communication mode, the first switch module 230 is connected to the terminal transmitter 312, and the first signal D2D TX output from the terminal transmitter 312 can be transmitted through the first switch module 230 and the antenna. have. In this case, the D2D transmission may be performed when a cellular communication operation is not performed. This is because, as described above, the frequency bands of the D2D TX and RX signals use the cellular UL band. Therefore, the D2D TX may be dropped by the UL TX.

Also, in step 709, when the first switch module 230 and the first switch module 230 are connected to the second terminal 250, the terminal proceeds to step 713 to perform D2D RX and WAN RX functions. That is, the terminal may receive the third signal D2D RX received through the antenna and the second terminal 250 of the first switch module 230 in step 713 . When the first switch module 230 is connected to the second terminal 250 in the terminal communication mode, the D2D RX signal transmitted from another terminal is transmitted to the terminal receiving unit 321 through the UL bandpass filter of the bandpass filter 323 and the LNA 322. can be transmitted.

Methods according to the embodiments described in the claims or specifications of the present invention may be implemented in the form of hardware, software, or a combination of hardware and software.

When implemented in software, a computer-readable storage medium storing one or more programs (software modules) may be provided. One or more programs stored in the computer-readable storage medium are configured for execution by one or more processors in an electronic device (device). One or more programs include instructions for causing an electronic device to execute methods according to embodiments described in a claim or specification of the present invention.

Such programs (software modules, software) include random access memory, non-volatile memory including flash memory, read only memory (ROM), electrically erasable programmable ROM (EEPROM: Electrically Erasable Programmable Read Only Memory), magnetic disc storage device, Compact Disc-ROM (CD-ROM), Digital Versatile Discs (DVDs), or any other form of It may be stored in an optical storage device or a magnetic cassette. Alternatively, it may be stored in a memory composed of a combination of some or all thereof. In addition, each configuration memory may be included in plurality.

In addition, the program is transmitted through a communication network consisting of a communication network such as the Internet, Intranet, Local Area Network (LAN), Wide LAN (WLAN), or Storage Area Network (SAN), or a combination thereof. It may be stored on an attachable storage device that can be accessed. Such a storage device may be connected to a device implementing an embodiment of the present invention through an external port. In addition, a separate storage device on the communication network may be connected to the device performing the embodiment of the present invention.

In the specific embodiments of the present invention described above, elements included in the invention are expressed in the singular or plural according to the specific embodiments presented. However, the singular or plural expression is appropriately selected for the context presented for convenience of description, and the present invention is not limited to the singular or plural element, and even if the element is expressed in plural, it is composed of the singular or singular. Even an expressed component may be composed of a plurality of components.

Meanwhile, although specific embodiments have been described in the detailed description of the present invention, various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments and should be defined by the claims described below as well as the claims and equivalents.

Claims (18)

A terminal device in a wireless communication system, comprising:
a first communication unit comprising a transmitting unit configured to transmit a first signal to a base station or another terminal and a first receiving unit configured to receive a second signal from the base station;
a second communication unit including a second receiving unit configured to receive a third signal from the other terminal and a third receiving unit configured to receive a fourth signal from the base station;
The first communication unit is connected to the switch module through a first terminal, the second communication unit is connected to the switch module through a second terminal,
In the case of the first communication mode, the switch module performs time division duplex (TDD) switching between the first terminal and the second terminal,
In the second communication mode, the switch module is connected to the first terminal,
A bandpass filter of the first communication unit is connected to the switch module through the first terminal, and the bandpass filter of the second communication unit is connected to the switch module through the second terminal.
The method according to claim 1,
The first signal is a cellular uplink transmission signal and a device to divice (D2D) transmission signal,
The third signal is a D2D reception signal,
The first signal is a signal of a cellular uplink band,
wherein the first signal and the third signal are separated by the switch module.
3. The method according to claim 2,
The first communication unit,
a terminal transmitting unit generating the D2D transmission signal; and a base station transmitting unit generating the cellular uplink transmission signal;
a first base station receiving unit for processing a cellular downlink received signal;
Band-filtering the transmission signals of the cellular uplink band and applying them to the first terminal of the switch module, band-filtering the reception signal of the cellular downlink band output from the first terminal of the switch module, A device comprising a first bandpass filter applied to the first base station receiving unit.
4. The method according to claim 3,
The second communication unit,
a terminal receiving unit for processing the D2D received signal;
a second base station reception unit for processing the cellular downlink reception signal;
The D2D reception signal of the cellular uplink band output from the second terminal of the switch module is band-filtered and applied to the terminal reception unit, and the reception signal of the cellular downlink band output from the second terminal of the switch module and a second bandpass filter for band-filtering and applying the band-pass filter to the second base station receiving unit.
5. The method according to claim 4,
the switch module is configured to connect an antenna to the first terminal of the second communication mode;
The first communication unit transmits the cellular uplink transmission signal through the first bandpass filter, and processes the cellular downlink reception signal.
5. The method according to claim 4,
The switch module is switched and connected to the first terminal and the second terminal at a transmission cycle and a reception cycle set in the first communication mode,
The first communication unit applies the D2D transmission signal to the first terminal of the switch module in the transmission period,
The second communication unit is configured to process the D2D reception signal applied to the second terminal of the switch module in the reception period.
A method of operating a terminal in a wireless communication system, the method comprising:
Transmitting and receiving a signal to and from the base station or the other terminal through a first communication unit comprising a transmitter for transmitting a first signal to a base station or another terminal, and a first receiver for receiving a second signal from the base station;
Receiving a signal from the other terminal or the base station through a second communication unit including a second receiver for receiving a third signal from the other terminal and a third receiver for receiving a fourth signal from the base station;
The first communication unit is connected to the switch module through a first terminal, the second communication unit is connected to the switch module through a second terminal,
In the case of the first communication mode, the switch module includes the process of performing time division duplex (TDD) switching between the first terminal and the second terminal,
In the second communication mode, the switch module is connected to the first terminal,
A bandpass filter of the first communication unit is connected to the switch module through the first terminal,
The band-pass filter of the second communication unit is connected to the switch module through the second terminal.
8. The method of claim 7,
The first signal is a cellular uplink transmission signal and a device to divice (D2D) transmission signal, the third signal is a D2D reception signal,
wherein the first signal is a signal of a cellular uplink band, and the first signal and the third signal are separated by the switch module.
9. The method of claim 8,
The process of transmitting and receiving a signal with the base station,
and transmitting the cellular uplink transmission signal to the base station through a base station transmission unit included in the first communication unit in the second communication mode.
9. The method of claim 8,
The process of transmitting and receiving a signal with the base station,
and receiving, in the second communication mode, a cellular downlink reception signal from the base station through a first base station reception unit included in the first communication unit.
9. The method of claim 8,
The process of transmitting a signal to the other terminal through the first communication unit or receiving a signal from the other terminal through the second communication unit,
and transmitting a D2D transmission signal to the other terminal in an uplink band through a terminal transmitter included in the second communication unit in the first communication mode.
9. The method of claim 8,
The process of transmitting the first signal,
and transmitting a D2D transmission signal to the other terminal in an uplink band only when the second communication mode is not performed.
In the transceiver chip set (transceiver chip set),
Transmits and receives a signal to and from the base station or the other terminal through a first communication unit comprising a transmitter for transmitting a first signal to a base station or another terminal and a first receiver for receiving a second signal from the base station,
Receiving a signal from the other terminal or the base station through a second communication unit comprising a second receiver for receiving a third signal from the other terminal, and a third receiver for receiving a fourth signal from the base station,
The first communication unit is connected to the switch module through a first terminal, and the second communication unit is connected to the switch module through a second terminal,
In the case of the first communication mode, the switch module performs time division duplex (TDD) switching between the first terminal and the second terminal,
In the second communication mode, the switch module is connected to the first terminal,
The band pass filter of the first communication unit is connected to the switch module through the first terminal,
The band pass filter of the second communication unit is a transceiver chip set connected to the switch module through the second terminal.
14. The method of claim 13,
the first signal is a cellular uplink transmission signal and a device to divice (D2D) transmission signal, the third signal is a D2D reception signal;
The first signal is a signal of a cellular uplink band, and the first signal and the third signal are separated by the switch module.
15. The method of claim 14,
In the second communication mode, the transceiver chip set for transmitting the cellular uplink transmission signal to the base station through the base station transmission unit of the first communication unit.
15. The method of claim 14,
In the second communication mode, a transceiver chip set for receiving a cellular downlink reception signal to the base station through a first base station reception unit of the first communication unit.
15. The method of claim 14,
In the first communication mode, a transceiver chip set for transmitting a D2D transmission signal to an uplink band of the other terminal through a device transmitter of the second communication unit. 15. The method of claim 14,
The band-pass filter of the first communication unit is connected to the first terminal of the switch module, and the band-pass filter of the second communication unit is connected to the second terminal of the switch module.

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